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A203457
Number of nX5 0..2 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors
1
1, 63, 3748, 143936, 5660631, 231588325, 9441977403, 385259518988, 15769361994812, 645761085331412, 26436118387761701, 1082201755675241681, 44303475359100889481, 1813730483493212443443, 74252023311120691422496
OFFSET
1,2
COMMENTS
Column 5 of A203460
LINKS
EXAMPLE
Some solutions for n=5
..2..2..2..2..0....0..0..1..1..0....1..2..2..1..0....2..2..2..2..2
..2..1..0..2..1....1..1..1..1..1....1..2..2..2..0....2..1..2..0..2
..2..0..0..2..2....1..1..2..2..1....2..2..0..2..0....2..2..2..0..2
..2..2..2..1..2....2..2..2..2..2....2..0..2..2..1....0..1..2..0..2
..1..1..2..2..2....2..2..0..2..2....2..2..2..2..1....0..0..2..2..2
CROSSREFS
Sequence in context: A375179 A069381 A051589 * A258684 A180926 A267963
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 02 2012
STATUS
approved